Articles for "Satellite navigation"

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Space | 25. August 2014 | posted by Jan Wörner | 1 Comment

'Rockets are tricky'

Die 30 Galileo-Satelliten
Credit: ESA-P. Carril
Artist's impression of the 30 Galileo satellites.

This is a quote from Elon Musk, a pioneer in the field of commercial space travel and founder of SpaceX. It expresses his feelings when, on 23 August 2014, SpaceX experienced an unsuccessful test launch. Equipment used for spaceflight is always very sophisticated technically, due to the complexity of the systems involved, the fact that they have to be deployed without much of a safety margin and the relative scarcity of options for real-time adjustments. Although rocket technology has been continuously and very successfully developed over the years, the aforementioned aspects imply that 'absolute certainty' is a pipe dream. This fact reared its head once again during the launch of two Galileo satellites on 22 August 2014. read more

Space | 18. July 2012 | 2 Comments

DLR demonstrates rendezvous using GPS and Optical Navigation

DLR’s Advanced Rendezvous demonstration using GPS and Optical Navigation (ARGON) has been successfully executed during the PRISMA mission in the time frame April 23-27, 2012. The ARGON experiment demonstrated a long-range rendezvous to a non-cooperative target by means of angles-only measurements. Starting from more than 30 km distance, the active Mango s/c approached the passive Tango s/c to reach a 3 km safe hold-point within five days of ground-based operations. read more